Add MQTT

[ChuckBuilds]

Describe the solution you'd like
I want to add a way to integrate with MQTT. I have not figured out the logic on how to actually display the messages from MQTT.

User configuration is immensely important as the ability to "interrupt" the display logic of existing displays broke early attempts at adding MQTT

MQTT would be the bridge to HomeAssistant and would ideally be able to display an image or text based on an event message such as doorbell, automation, button press.

Test case ideas : Doorbell notification, Number of lights on in the home, Door lock status.

Just cant decide on how to "rotate"" in to the MQTT display or enable "on demand" display to over-ride all displays similar to live sports but would need to make user configurable.... somehow.